syzkaller login: [ 37.268155] BUG: Bad rss-counter state mm:00000000617cbd10 type:MM_FILEPAGES val:33 [ 37.269257] BUG: Bad rss-counter state mm:00000000617cbd10 type:MM_ANONPAGES val:22 [ 37.481581] ================================================================== [ 37.482511] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.483465] Read of size 8 at addr ffff88800af7d968 by task sshd/223 [ 37.484340] [ 37.484561] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.485424] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.486434] Call Trace: [ 37.486755] [ 37.487043] dump_stack_lvl+0x91/0xf0 [ 37.487549] print_report+0xcc/0x620 [ 37.488035] ? __virt_addr_valid+0x102/0x340 [ 37.488592] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.489212] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.489844] kasan_report+0xbe/0xf0 [ 37.490325] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.490977] vma_interval_tree_remove+0xc75/0xec0 [ 37.491613] vma_prepare+0xc54/0x11a0 [ 37.492121] __split_vma+0x5af/0x950 [ 37.492614] ? __pfx___split_vma+0x10/0x10 [ 37.493170] ? find_held_lock+0x2c/0x110 [ 37.493725] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.494314] ? lock_is_held_type+0x9f/0x120 [ 37.494895] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.495549] ? mtree_range_walk+0x632/0x900 [ 37.496138] ? mas_walk+0x5c7/0x7c0 [ 37.496645] do_vmi_munmap+0x1f1/0x2b0 [ 37.497156] mmap_region+0x1f9/0x2660 [ 37.497673] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.498224] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.498985] ? __pfx_lock_acquire+0x10/0x10 [ 37.499562] ? __pfx_mmap_region+0x10/0x10 [ 37.500118] ? security_mmap_addr+0x7d/0xa0 [ 37.500681] ? get_unmapped_area+0x1f5/0x3f0 [ 37.501257] do_mmap+0x854/0xf00 [ 37.501725] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.502253] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.502855] ksys_mmap_pgoff+0x3af/0x500 [ 37.503407] do_syscall_64+0x3f/0x90 [ 37.503914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.504589] RIP: 0033:0x7f3006f97d82 [ 37.505082] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 37.507363] RSP: 002b:00007ffcad72e128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.508330] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3006f97d82 [ 37.509238] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f30063d1000 [ 37.510132] RBP: 00007f30063d1000 R08: 0000000000000009 R09: 0000000000001000 [ 37.511029] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b92011ec0 [ 37.511932] R13: 00007ffcad72e140 R14: 00007ffcad72e170 R15: 00007ffcad72e4d0 [ 37.512834] [ 37.513150] [ 37.513380] Allocated by task 214: [ 37.513836] kasan_save_stack+0x22/0x50 [ 37.514374] kasan_set_track+0x25/0x30 [ 37.514894] __kasan_slab_alloc+0x59/0x70 [ 37.515474] kmem_cache_alloc+0x16b/0x370 [ 37.516027] vm_area_dup+0x20/0x160 [ 37.516505] __split_vma+0x170/0x950 [ 37.517002] split_vma+0xc6/0x110 [ 37.517464] mprotect_fixup+0x8d2/0xb30 [ 37.517999] do_mprotect_pkey+0x87e/0xd40 [ 37.518554] __x64_sys_mprotect+0x78/0xc0 [ 37.519103] do_syscall_64+0x3f/0x90 [ 37.519609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.520295] [ 37.520525] Freed by task 117: [ 37.520947] kasan_save_stack+0x22/0x50 [ 37.521487] kasan_set_track+0x25/0x30 [ 37.522017] kasan_save_free_info+0x2b/0x50 [ 37.522583] __kasan_slab_free+0x10a/0x190 [ 37.523149] kmem_cache_free+0x10d/0x4d0 [ 37.523708] rcu_core+0x8c8/0x2860 [ 37.524181] __do_softirq+0x1b7/0x7d4 [ 37.524694] [ 37.524922] Last potentially related work creation: [ 37.525531] kasan_save_stack+0x22/0x50 [ 37.526065] __kasan_record_aux_stack+0x8e/0xa0 [ 37.526672] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.527367] remove_vma+0x139/0x170 [ 37.527848] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.528444] do_vmi_munmap+0x1f1/0x2b0 [ 37.528956] __vm_munmap+0x138/0x3a0 [ 37.529455] __x64_sys_munmap+0x59/0x80 [ 37.529987] do_syscall_64+0x3f/0x90 [ 37.530483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.531170] [ 37.531408] The buggy address belongs to the object at ffff88800af7d910 [ 37.531408] which belongs to the cache vm_area_struct of size 168 [ 37.532972] The buggy address is located 88 bytes inside of [ 37.532972] freed 168-byte region [ffff88800af7d910, ffff88800af7d9b8) [ 37.534480] [ 37.534710] The buggy address belongs to the physical page: [ 37.535426] page:000000001d8911e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xaf7d [ 37.536618] memcg:ffff88800e4e7601 [ 37.537088] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.537793] page_type: 0xffffffff() [ 37.538284] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.539295] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4e7601 [ 37.540307] page dumped because: kasan: bad access detected [ 37.541037] [ 37.541272] Memory state around the buggy address: [ 37.541906] ffff88800af7d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 37.542840] ffff88800af7d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 37.543790] >ffff88800af7d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.544720] ^ [ 37.545579] ffff88800af7d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 37.546514] ffff88800af7da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.547457] ================================================================== [ 37.548572] Disabling lock debugging due to kernel taint [ 39.366517] BUG: Bad rss-counter state mm:000000008bbf490d type:MM_FILEPAGES val:33 [ 39.367271] BUG: Bad rss-counter state mm:000000008bbf490d type:MM_ANONPAGES val:22 [ 39.831696] BUG: Bad rss-counter state mm:00000000f943478e type:MM_FILEPAGES val:33 [ 39.832796] BUG: Bad rss-counter state mm:00000000f943478e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57347' (ECDSA) to the list of known hosts. 2023/06/20 08:50:09 fuzzer started 2023/06/20 08:50:10 dialing manager at localhost:44161 2023/06/20 08:50:10 checking machine... 2023/06/20 08:50:10 checking revisions... [ 40.471352] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:50:10 testing simple program... [ 40.515060] cgroup: Unknown subsys name 'net' [ 40.564173] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:50:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f7cd850 RCX=ffff88800844f780 RDX=ffffea00003df340 RSI=ffff88800f7ccbe0 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88801bcdfa38 R8 =ffff88800f7cd720 R9 =0000000000000000 R10=ffffea00003df300 R11=00000000800d0007 R12=dffffc0000000000 R13=ffff88801bcdfa78 R14=ffff88800844f780 R15=ffff88800f7ccbe0 RIP=ffffffff81810196 RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe81ff46900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffcedd95000 CR3=0000000016e3a000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff81288f48 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a88 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000ba82 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800fd31ec0 RIP=ffffffff813ad42f RFL=00000286 [--S--P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f001b59c8e0 CR3=000000000d536000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=544ef93588d2898b7c41508e4460d038 XMM02=00000000001207c8ec2efd57dc4c00df XMM03=0000000000126ab07be83ac8c337ce1a XMM04=e55b9c03b744d29b00000000000ae988 XMM05=83594ee05b8d38950000000000135ef0 XMM06=a7fe69a4e3fef13a0000000000134d58 XMM07=e042d86d42eb936e0000000000126d30 XMM08=7be83ac8c337ce1a0000000000120828 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000